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Flashcards in Equilibrium and acids Deck (18)
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1
Q

What does equilibrium mean?

A

The rate of the forward reaction is equal to the rate of the backward reaction

2
Q

How can you alter the position of equilibrium?

A
  • Temperature change
  • Pressure change
  • Concentration change
3
Q

What does it mean when the equilibrium lies to the right of the reaction?

A

The concentration of the products is greater than the concentration of the reactants

4
Q

What does it mean when the equilibrium lies to the left of the reaction?

A

The concentration of the reactants is greater than the concentration of the products

5
Q

What happens during the Contact Process?

A
  • Sulfur burned in furnace to make sulfur dioxide
  • Sulfur dioxide + oxygen combine to make sulfur trioxide
  • Sulfur trioxide dissolved in water to make sulfuric acid
6
Q

What are the uses of sulfuric acid?

A
  • Paints and pigments
  • Soaps
  • Fertilisers
  • Fibres
7
Q

How can the equilibrium be moved to the right of the equation?

A
  • Adding more reactant

- Removing product

8
Q

How the equilibrium be moved to the left of the equation?

A
  • Reducing amount of reactant

- Increasing amount of product

9
Q

What happens if you increase the temperature during the Contact Process?

A
  • Increases rate of reaction
  • Reduces yield
  • Moves equilibrium to left
10
Q

What happens if you increase the pressure during the Contact Process?

A
  • Increases yield

- Moves equilibrium to far right

11
Q

What happens to a strong acid in water?

A

It ionises completely

12
Q

What happens to a weak acid in water?

A

It partially ionises (reversible reaction)

13
Q

What determines the concentration of an acid?

A

How many moles of the acid are dissolved in 1DM

14
Q

What determines the strength of an acid?

A

How much it ionises

15
Q

Why are stronger acids better conductors of electricity?

A

There are more hydrogen ions in the acid to carry the charge

16
Q

When does a precipitation reaction occur?

A

When a precipitate is made by mixing two ionic solutions together

17
Q

How can you make an insoluble compound?

A
  • Mix the reactant solutions
  • Filter off the precipitate
  • Wash the residue in the filter funnel
  • Dry the residue
18
Q

What are halides?

A

Ions made by the group 7 elements (halogens)